33121452 has 96 divisors (see below), whose sum is σ = 97216000. Its totient is φ = 8721216.

The previous prime is 33121447. The next prime is 33121453. The reversal of 33121452 is 25412133.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (33121453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53199 + ... + 53817.

Almost surely, 2^33121452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33121452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48608000).

33121452 is an abundant number, since it is smaller than the sum of its proper divisors (64094548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33121452 is a wasteful number, since it uses less digits than its factorization.

33121452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 644 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 33121452 is about 5755.1239778132. The cubic root of 33121452 is about 321.1464476712.

Adding to 33121452 its reverse (25412133), we get a palindrome (58533585).

The spelling of 33121452 in words is "thirty-three million, one hundred twenty-one thousand, four hundred fifty-two".